Characteristics and performance
The Hallite 775 double-acting piston seal is a compact seal for light to medium-duty applications and designed to fit two housing standards; one for standard O-ring grooves, the second for grooves designed for an O-ring and two back-up rings. The advanced face geometry gives the Hallite 775 single-acting capabilities making it an excellent choice for double-acting applications where minimal dynamic leakage is required.
Comprised of a tough polyurethane face seal which is pre-loaded by a rectangular cross-section NBR expander, the standard material is suitable for hydraulic mineral oil applications.
Product details
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Max pressure *
Temp range
Max speed
* Max pressure stated is dependant on the material variant selected. Please consult the datasheet for further information.
- Recomended
- Possible
- Not suitable
* For fluid types marked as possible, please call our team of experts on (02) 8886 1600 to talk through your requirements and determine if this seal is the most suitable for your needs.
| Dynamic application | Static application | |
|---|---|---|
| Fluids based on mineral oil | ||
| Any | Recommended | Recommended |
| Waterbased fluids | ||
| HFA (5/95) | Not suitable | Not suitable |
| HFB (60/40 invert emulsion) | Not suitable | Not suitable |
| HFC (water glycol) | Not suitable | Not suitable |
| Water | Not suitable | Not suitable |
| Other fluid types | ||
| Air/Nitrogen | Possible | Possible |
| HFD (Phosphate ester ARYL Type) | Not suitable | Not suitable |
| Synthetic esters (HEES, HFDU) | Recommended | Recommended |
